tldr/pages/common/readonly.md

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readonly

Set read-only shell variables. More information: https://manned.org/readonly.1posix.

  • Set a read-only variable:

readonly {{variable_name}}={{value}}

  • Mark a variable as read-only:

readonly {{existing_variable}}

  • [p]rint the names and values of all read-only variables to stdout:

readonly -p